Flynn Nightsider and the Ire of Inferno - Flynn Nightsider, #3

The End of the Fight. The End of the Lies. The End of the World. Against all odds, Flynn has survived the violent battle that nearly destroyed the Capital. But his safety came at a great cost-all his friends and allies, including Aurelia, have been captured, incapacitated, or killed. Meanwhile, his unique ability, once prophesied to change the world, seems useless against the overwhelming darkness. Left to face the enemy alone, Flynn ventures into the unknown in a last, desperate attempt to save the earth from the forces of the Underworld.
But what he discovers isn't what he expected. The mysterious dimension hides secrets that could shift the balance in the battle against the all-powerful being who has the nation under his spell, seemingly unstoppable. With the fate of the world at stake, Flynn pushes on, knowing only one thing for sure: He must find a way to defeat the ultimate evil, or all will be lost.